Ron,If I remember the one I got from Napa comes with ai nstallation tool?I think it was $11 or $12 bucks.Its not that hard.if you have a press.If not a little harder, Just try not to cock it. I froze my pulley in the (ice box)as my Dad use to call it .Heated the sleeve and Bingo.....ten second job ....

I talked to Tom at T M Tractors and he told me that the Case I/H dealers have a kit for this as RedNed described.
I ordered one along with about $300 worth of parts to complete the rebuild.
The sleeve kit comes with the sleeve,front seal and installation tool for $13.00.

Mac,
I couldn't find a number for the kit.
I called Columbia Tractor and just told one of the parts guys what I was looking for.
He knew what it was and looked the part number up in his book.

I will probably get my order from them sometime next week and will be glad to post the number for this kit.

Or if you want you can give them a call at (518) 828 1781.

They were recommened to me by Tom at T P Tractor Salvage.
They are located in New York state.
Nice folks to deal with, the only down side I can see is that they charge you 8.25% sales tax on your orders. (Och!!)